KG,
Not everything will be down to cost/replacement, more than just not taking xyz, especially in the summer.
We camped on new years day on Dartmoor last year in the snow and it was a heavy camp because of:
1. Winter sleeping bags are heavy
2. Took a wool blanket for additional insulation.
3. Carried another sleeping bag for doggo.
4. Took extra luxury items like extra booze, games, lots of sweet treats (over normal amounts).
5. We also packed for getting snowed in, which considering we only parked a few miles away, would probably have made sense to leave the extra stuff in the car rather than carrying it.....literally just considered that right now...
As above, I can fit all my summer gear into a sabre 45 (45 litre) with a predator pouch on the front and a 10l rocket pouch one side, and a tent on the other...it'd be a very different type of camp, but its possible to condense - Not suggesting you need a smaller pack, you don't! But suggesting that its always easy to fill a bigger pack with an extra this or that.
It'd be interesting to see a rough kit list.
Also for your info, you can pick up some decent bargains on random "camping" gear in places like lidl an aldi.
Edit:
I couldn't tell you the weights as I'd need to look them all up, but in my pack main body right now I have:
1. Light summer sleeping bag packs v small - from lidl iirc?
2. Inflatable sleep mat packs v small - think from go outdoors, not an expensive one (but I appreciate not peanuts).
3. I have my sleep stuff in dry bag (which is basically thermal long-sleeved top and bottoms and a beanie hat - also socks which double as my second pair)
4. Hygiene kit in a dry bag - (deodorant, toothpaste, tooth brushes).
5. Bog kit in another bag - trowel, loo roll, hand sanitiser.
6. A bag containing a gas bottle, some cotton wool and 2 lightweight mugs.
On the top ill have FAK which is designed with 2 + doggo in mind - probably overkill but haven't got far with that.
I'll close it up, stuff my down jacket under the top clip with a neck scarf thing (which will also double as a pillow with a few other clothing items).
Can't remember what's on the inside zip of the lid :/ maybe my Sawyer water filter?
Main lid zip:
Keys
Headtorch
Knife
Cordage
Probably would contain snacks too and maybe my phone.
Close that all down and on the very top under the elastic I have a roll mat.
Side rocket pouch:
2 litre water bottle
More snacks? I can't remember
Other side is my tent can't remember name of it.
On the front is a predator pouch which has 3 pockets, 2 small one bigger
1 small I know for a fact contains some snack bars
I think it also contains 2 plastic fork/spoons (double ended).
Not sure on other small
Big one contains:
Pocket rocket stove in plastic box (which also holds 2 disposable lighters)
Mess tin with brewkit inside it (brewkit is the instant coffee sticks, tea bags, hot chocolate etc etc etc).
In the back pocket of the predator pouches I have a sit mat and prior to her finding them a couple bars of dark chocolate stashed away for a rainy day...
Attached to the outside of the pack behind the predator pouch is a small plastic and latex collapsible doggo bowl.
There is room inside main compartment there for a 2l water bottle and some food as well as a bag of doggo grub.
I'm bound to have missed something, but that's an idea of the crap I take...
Also dog lead somewhere and maybe drone if I can be arsed..